Billolivia kyi Luu & G. Tran (Gesneriaceae) is described as a new species from the Bidoup-Nui Ba National Park, Vietnam. It is distinct from its closest morphological match B. poilanei in having long petioles, coarsely dentate leaf margins, sparsely pubescent pedicels, ovate calyx lobes not persistent on fruits, and large fruits with persistent connate part of the calyx. Billolivia kyi differs from all other known Billolivia species in having dark red to purple flowers with a yellow patch on the corolla throat, and adaxially sparsely but abaxially densely pubescent laminas.